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and I would hope he changed the software - wouldnt it run lean - even with the larger injectors, tb, etc

It might be able to correct it based on the lambda values. If lambda = 1, then fuel and air are at stoichiometric ratios. Where he would run into issues is at WOT, since WOT isn't target based on the ms43

That said, if he has 330 injectors and 325 software, there is a chance it wouldn't run lean even at WOT -- depends on the flow rate of the injectors.

You are almost certainly running lean. Get the 330 injectors and 330 MAF.

330 tune is programmed with larger injectors in mind. So it fires them at durations intended for that specific size. If you were to install smaller injectors, it'll still open the injectors for the same duration. Net result is less fuel. The restriction of your current intake setup is not enough to account for the reduced fuel.

Further more, the 325 and 330 MAF almost definitely don't have the same calibration. So the DME thinks its getting X kg/h, while in reality it's getting Y.

Basically your engine has no idea how much air and fuel it's getting. As you can imagine, those are very important parameters to running an engine. It can correct based on lambda values, but that'll be less than optimal. Also the lambda is ignored at WOT -- so your car can be downright dangerous to drive at full load.

You are almost certainly running lean. Get the 330 injectors and 330 MAF.

330 tune is programmed with larger injectors in mind. So it fires them at durations intended for that specific size. If you were to install smaller injectors, it'll still open the injectors for the same duration. Net result is less fuel. The restriction of your current intake setup is not enough to account for the reduced fuel.

Further more, the 325 and 330 MAF almost definitely don't have the same calibration. So the DME thinks its getting X kg/h, while in reality it's getting Y.

Basically your engine has no idea how much air and fuel it's getting. As you can imagine, those are very important parameters to running an engine. It can correct based on lambda values, but that'll be less than optimal. Also the lambda is ignored at WOT -- so your car can be downright dangerous to drive at full load.

ok i wont WOT it, so leave the normal intake on? i have a buddy that blew his 330 and got a whole engine for his and he has all the stuff i can grab the maf, injectors and intake.

why wouldnt he reset it??? the light needs to be reset, the code is already stored so its not goin anywhere. only thing driving it 50 miles is going to do is put the car through its drive cycles and set the monitors. thats after the light is reset. At which point while its doing that its going to check for any malfunctions.... and if your maf is ****ie it will probably throw the light again.

Well that engine threw a rod out the side of the block only 500 miles into driving it, their installing another one free......I was driving 50 in 5:30 traffic in Houston and it blew up....200 dollar tow truck...

sounds pretty good, just make sure you get some kind of warranty. engines with front end collisions sometimes mess with the engines balance and internals.
it's just good to have incase.

Quote:

Originally Posted by metlic53

Well that engine threw a rod out the side of the block only 500 miles into driving it, their installing another one free......I was driving 50 in 5:30 traffic in Houston and it blew up....200 dollar tow truck...